GETTING ANSWERS ON HIS OWN. >> ALL RIGHT, MOLA, THANK YOU FOR YOUR REPORTING. >>> WE TURN NOW TO THE GROWING FEARS OVER THE SO-CALLED TRIPLEDEMIC FLU. ADULT HOSPITALIZATIONS ARE AT LEVELS NOT SEEN SINCE THE OMICRON SURGE A YEAR AGO. OUR CHIEF NATIONAL CORRESPONDENT MATT GUTMAN IS IN LOS ANGELES WHERE CASES ARE PUSHING SOME HOSPITALS THERE TO THE BRINK. GOOD MORNING, MATT. >> Reporter: HEY, GOOD MORNING, ROBIN. THAT TRIO OF COVID, FLU AND RSV ARE SURGING HERE IN CALIFORNIA PROMPTING HEALTH OFFICIALS HERE IN L.A. COUNTY TO CONSIDER BRINGING BACK THE INDOOR MASK MANDATE AND FLU HOSPITALIZATIONS HAVE NEARLY DOUBLED COMPARED TO THE PAST WEEK AND IT'S LEFT PEDIATRIC WARDS AT HOSPITALS LIKE THIS AT OR OVER CAPACITY. THIS MORNING, HEALTH OFFICIALS SOUNDING THE ALARM AS THE TRIPLEDEMIC OF RSV, FLU AND COVID WREAK HAVOC ON OUR NATION'S HOSPITALS AND PATIENTS OF ALL AGES. >> RIGHT NOW IT'S JUST ANOTHER AMBULANCE CAME IN. THAT'S ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE. >> YES. THIS IS NOT UNUSUAL FOR THIS WINTER. IT'S JUST BEEN RELENTLESS. WE'RE JUST SEEING SO MANY ACUTE CASES COMING IN ALL THE TIME. >> Reporter: OVER THE LAST THREE DAYS IN LOS ANGELES, NEARLY 10,000 NEW CASES OF COVID-19 WERE REPORTED IN THE COUNTY ALONG WITH 28 DEATHS. L.A. COUNTY, THE NATION'S LARGEST SEEING A FASTER THAN EXPECTED RISE IN COVID, NOW CONSIDERING AN INDOOR MASK MANDATE. 44 STATES AS WELL AS D.C. AND PUERTO RICO REPORTING VERY HIGH OR HIGH LEVELS OF INFLUENZA-LIKE ACTIVITY. HEALTH OFFICIALS WARNING ADULT HOSPITALIZATIONS ARE SURGING TO ALARMING LEVELS. WITH 80% OF ADULT HOSPITAL BEDS FULL, THIS IS THE HIGHEST ADULT OCCUPANCY SINCE LAST YEAR'S OMICRON SURGE. FLU-RELATED HOSPITALIZATIONS THE HIGHEST FOR THE TIME IN THE SEASON SINCE 2010. NEW YORK CITY SEEING VERY HIGH LEVELS OF FLU-LIKE ILLNESS FOR THE FIFTH WEEK IN A ROW. >> THESE NUMBERS ARE SPIKING WAY TOO EARLY COMPARED TO HISTORICAL TRENDS, AND WE HAVE 27,000 POSITIVE CASES RIGHT NOW. >> Reporter: CHILDREN PARTICULARLY VULNERABLE. THIS PEDIATRIC HOSPITAL HAS BEEN NEAR 100% CAPACITY. >> THE EMERGENCY ROOMS ARE INUNDATED WITH ALL TYPES OF, YOU KNOW, JUST RESPIRATORY INFECTIONS, BUT OUR PEDIATRIC FLOORS AND ICUs HAVE BEEN FULL ALL ACROSS THE COUNTRY AND IN LOS ANGELES. >> Reporter: YOU KNOW, I'VE ASKED HEALTH OFFICIALS MAYBE WE'RE JUST SEEING THE PEAK EARLIER AND THE NUMBERS WILL SOON START TO DECLINE BUT THEY SAY THAT IS ALMOST CERTAINLY NOT THE CASE BECAUSE PEOPLE ARE GOING TO START TO TRAVEL AND GATHER IN LARGE GROUPS IN DECEMBER AND THEN IN JANUARY AND THAT'S WHEN THINGS GET -- TEND TO GET BAD. THEY SAY THE BEST ADVICE THEY CAN GIVE SINCE RSV AND ALL THESE VIRUSES TEND TO LIVE IN DROPLETS IS JUST WASH YOUR HANDS FREQUENTLY. TRY TO WEAR A MASK AND IF YOU'RE SICK, STAY HOME.